Ricoh Company, Ltd.

Shinichi Kakuda

Hisashi Habashi

Yoshihisa Ohta

Daisuke Takagi

Tatsuya Sameshima

Tomoyuki Aratani

Takashi Mori

Keisuke Hayashi

Juichi Furukawa

Tetsuro Hirota

Soyoung Park

Mitsumi Fujii

Tomoaki Nakano

Shuzo Matsumoto

Shozo Sakura

Kaname Morita

Hitoshi Usami

Hideyuki Makita

Taeko Murai

An apparatus for fabricating a three-dimensional object includes a fabrication stage and a flattener. A fabrication layer in which powder particles are bound together is formed layer-by-layer on the fabrication stage. The flattener relatively moves in a moving direction along a stage surface of the fabrication stage and flattens a surface of powder on the fabrication stage to form a powder layer. The fabrication stage and the flattener are arranged to be relatively movable in a height direction. In formation of the powder layer on the fabrication layer formed on the fabrication stage, the apparatus performs an operation to increase a distance between the flattener and the fabrication stage in the height direction when the flattener moves to a position near an edge of the fabrication layer in the moving direction.

Apparatus for fabricating three-dimensional object

A liquid ejection head includes channel forming members and a surface treatment film. The channel forming members are joined to each other via an adhesive agent to form a channel for liquid. The surface treatment film is formed on a surface of at least one of the channel forming members. The surface treatment film is an oxidized film including Si. The oxidized film further includes a transition metal forming a passive film.

Liquid ejection head and image forming apparatus incorporating same

A liquid ejection head is provided. The liquid ejection head includes a nozzle substrate to eject a droplet of a liquid from a nozzle thereof; a surface treatment layer, which is located on the surface of the nozzle substrate and which is an oxide layer including silicon (Si) and a transition metal capable of forming a passive layer; and an organic liquid repellent layer located on the surface treatment layer.

Liquid ejection head, and image forming apparatus using the liquid ejection head

The same water-repellent process is provided on a nozzle forming part and the outer circumferential part of a nozzle formation member. A first water-repellent layer is formed through a first water-repellent process on the surface of a nozzle forming part (which forms nozzles on a surface of a nozzle plate, and a second water-repellent layer is formed through a second water-repellent process different from the first water-repellent process on the surface of the outer circumferential part (outer portion of surface) of the nozzle plate.

Liquid drop ejecting head and image forming apparatus, liquid drop ejecting apparatus, recording method

A liquid discharging head and an image formation apparatus are disclosed. The liquid discharging head includes a base member that has a joining surface, to which a piezoelectric device is joined, and a bottom surface. The width of the joining surface in longitudinal directions of a liquid chamber is less than the width of the bottom surface in the longitudinal directions of the liquid chamber; accordingly, the area of the joining surface is less than the area of the bottom surface.

Liquid discharging head and an image formation apparatus

An ink jet printing apparatus includes an ink jet head having a plurality of nozzles for respectively ejecting ink drops, a plurality of ink chambers communicating with the nozzles, and a plurality of electromechanical conversion elements corresponding to the respective nozzles. The volume of the ink chamber of the non-drive channel is increased by the influence of the drive channel adjacent thereto, and thereby undesired ejection of the ink drop occurs. To solve this problem, a drive energy set for ejecting the ink drop is applied to the piezoelectric elements of the drive chambers n&minus;1, n&plus;1 and a reduced drive energy set for not ejecting the ink drops is applied to the piezoelectric element of the non-drive channel n.

Ink jet printing apparatus

An ink jet printing head includes a nozzle plate having an outside surface and a plurality of nozzles for discharging ink from the outside surface, each nozzle having a first diameter at a peripheral edge of the nozzle plate. A surface treatment layer is provided on the outside surface of the nozzle plate, the surface treatment layer having a plurality of openings overlapping the plurality of nozzles, each opening having a second diameter at a peripheral edge of the surface treatment layer, the second diameter being smaller than the first diameter.

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Kanagawa, Japan

Shinichi Kakuda